linux/include/scsi/libfcoe.h, branch v3.5

[SCSI] fcoe, bnx2fc, libfcoe: SW FCoE and bnx2fc use FCoE Syfs

2012-05-23T08:43:13Z

This patch has the SW FCoE driver and the bnx2fc driver make use of the new fcoe_sysfs API added earlier in this patch series. After this patch a fcoe_ctlr_device is allocated with private data in this order. +------------------+ +------------------+ | fcoe_ctlr_device | | fcoe_ctlr_device | +------------------+ +------------------+ | fcoe_ctlr | | fcoe_ctlr | +------------------+ +------------------+ | fcoe_interface | | bnx2fc_interface | +------------------+ +------------------+ libfcoe also takes part in this new model since it discovers and manages fcoe_fcf instances. The memory allocation is different for FCFs. I didn't want to impact libfcoe's fcoe_fcf processing, so this patch creates fcoe_fcf_device instances for each discovered fcoe_fcf. The two are paired using a (void * priv) member of the fcoe_ctlr_device. This allows libfcoe to continue maintaining its list of fcoe_fcf instances and simply attaches and detaches them from existing or new fcoe_fcf_device instances. Signed-off-by: Robert Love Tested-by: Ross Brattain Signed-off-by: James Bottomley

[SCSI] libfcoe: Add fcoe_sysfs

2012-05-23T08:40:09Z

This patch adds a 'fcoe bus' infrastructure to the kernel that is driven by changes to libfcoe which allow LLDs to present FIP (FCoE Initialization Protocol) discovered entities and their attributes to user space via sysfs. This patch adds the following APIs- fcoe_ctlr_device_add fcoe_ctlr_device_delete fcoe_fcf_device_add fcoe_fcf_device_delete They allow the LLD to expose the FCoE ENode Controller and any discovered FCFs (Fibre Channel Forwarders, e.g. FCoE switches) to the user. Each of these new devices has their own bus_type so that they are grouped together for easy lookup from a user space application. Each new class has an attribute_group to expose attributes for any created instances. The attributes are- fcoe_ctlr_device * fcf_dev_loss_tmo * lesb_link_fail * lesb_vlink_fail * lesb_miss_fka * lesb_symb_err * lesb_err_block * lesb_fcs_error fcoe_fcf_device * fabric_name * switch_name * priority * selected * fc_map * vfid * mac * fka_peroid * fabric_state * dev_loss_tmo A device loss infrastructre similar to the FC Transport's is also added by this patch. It is nice to have so that a link flapping adapter doesn't continually advance the count used to identify the discovered FCF. FCFs will exist in a "Disconnected" state until either the timer expires or the FCF is rediscovered and becomes "Connected." This patch generates a few checkpatch.pl WARNINGS that I'm not sure what to do about. They're macros modeled around the FC Transport attribute building macros, which have the same 'feature' where the caller can ommit a cast in the argument list and no cast occurs in the code. I'm not sure how to keep the code condensed while keeping the macros. Any advice would be appreciated. Signed-off-by: Robert Love Tested-by: Ross Brattain Acked-by: Greg Kroah-Hartman Signed-off-by: James Bottomley

[SCSI] fcoe: Allocate fcoe_ctlr with fcoe_interface, not as a member

2012-05-23T08:36:27Z

Currently the fcoe_ctlr associated with an interface is allocated as a member of struct fcoe_interface. This causes problems when attempting to use the new fcoe_sysfs APIs which allow us to allocate the fcoe_interface as private data to the fcoe_ctlr_device instance. The problem is that libfcoe wants to be able use pointer math to find a fcoe_ctlr's fcoe_ctlr_device as well as finding a fcoe_ctlr_device's assocated fcoe_ctlr. To do this we need to allocate the fcoe_ctlr_device, with private data for the LLD. The private data contains the fcoe_ctlr and its private data is the fcoe_interface. This patch only allocates the fcoe_interface with the fcoe_ctlr, the fcoe_ctlr_device will be added in a later patch, which will complete the below diagram- +------------------+ | fcoe_ctlr_device | +------------------+ | fcoe_ctlr | +------------------+ | fcoe_interface | +------------------+ This prep work will allow us to go from a fcoe_ctlr_device instance to its fcoe_ctlr as well as from a fcoe_ctlr to its fcoe_ctlr_device once the fcoe_sysfs API is in use (later patches in this series). Signed-off-by: Robert Love Tested-by: Ross Brattain Signed-off-by: James Bottomley

[SCSI] libfcoe: Support extra MAC descriptor to be used as FCoE MAC

2012-03-28T08:05:37Z

Some switch implementations (eg., HP virtual connect FlexFabric) send two MAC descriptors in FIP FLOGI response, with first MAC descriptor (granted_mac) used as FPMA, and the second one (fcoe_mac) used as destination address for sending/receiving FCoE packets. fip_mac continues to be used for FIP traffic. This patch introduces fcoe_mac in fcoe_fcf structure. For regular switches, both fcoe_mac and fip_mac will be the same. For the switches that send additional MAC descriptor, fcoe_mac is updated. Signed-off-by: Bhanu Prakash Gollapudi Signed-off-by: Robert Love Signed-off-by: James Bottomley

[SCSI] fcoe: fix fcoe in a DCB environment by adding DCB notifiers to set skb priority

2011-12-15T07:02:07Z

Use DCB notifiers to set the skb priority to allow packets to be steered and tagged correctly over DCB enabled drivers that setup traffic classes. This allows queue_mapping() routines to be removed in these drivers that were previously inspecting the ethertype of every skb to mark FCoE/FIP frames. Signed-off-by: John Fastabend Signed-off-by: Robert Love Signed-off-by: James Bottomley

[SCSI] fcoe,libfcoe: Move common code for fcoe_get_lesb to fcoe_transport

2011-10-16T15:38:01Z

Except for obtaining the netdev from lport, fcoe_get_lesb is the common code for the LLDs. Signed-off-by: Bhanu Prakash Gollapudi Acked-by: Yi Zou Signed-off-by: James Bottomley

[SCSI] fcoe: Move common functions to fcoe_transport library

2011-08-27T14:35:46Z

Export fcoe_get_wwn, fcoe_validate_vport_create and fcoe_wwn_to_str so that all LLDs can use these common function. Signed-off-by: Bhanu Prakash Gollapudi Signed-off-by: James Bottomley

[SCSI] libfcoe: Move FCOE_MTU definition from fcoe.h to libfcoe.h

2011-03-01T00:33:12Z

both fcoe and bnx2fc drivers can access the common definition of FCOE_MTU. Signed-off-by: Bhanu Prakash Gollapudi Signed-off-by: Robert Love Signed-off-by: James Bottomley

[SCSI] libfcoe: Move common code from fcoe to libfcoe module

2011-02-12T17:18:18Z

To facilitate LLDDs to reuse the code, skb queue related functions are moved to libfcoe, so that both fcoe and bnx2fc drivers can use them. The common structures fcoe_port, fcoe_percpu_s are moved to libfcoe. fcoe_port will now have an opaque pointer that points to corresponding driver's interface structure. Also, fcoe_start_io and fcoe_fc_crc are moved to libfcoe. As part of this change, fixed fcoe_start_io to return ENOMEM if skb_clone fails. Signed-off-by: Bhanu Prakash Gollapudi Signed-off-by: Robert Love Signed-off-by: James Bottomley

[SCSI] libfcoe: add fcoe_transport structure defines to include/scsi/libfcoe.h

2011-02-12T17:05:29Z

add the fcoe_transport struct to the common libfcoe.h header so all fcoe transport provides can use it to attach itself as an fcoe transport. This is the header part, and the next patch will be the transport code itself. Signed-off-by: Yi Zou Signed-off-by: Bhanu Prakash Gollapudi Signed-off-by: Robert Love Signed-off-by: James Bottomley